core: added parameter to enable/disable automatic binding of ipv6 interfaces

TODO: documentation

cfg.lex

@@ -370,6 +370,8 @@ DNS_CACHE_MAX_TTL	dns_cache_max_ttl
 DNS_CACHE_MEM		dns_cache_mem
 DNS_CACHE_GC_INT	dns_cache_gc_interval
 DNS_CACHE_DEL_NONEXP	dns_cache_del_nonexp|dns_cache_delete_nonexpired
+/* ipv6 auto bind */
+AUTO_BIND_IPV6		auto_bind_ipv6
 /* blacklist */
 DST_BLST_INIT	dst_blacklist_init
 USE_DST_BLST		use_dst_blacklist
@@ -751,6 +753,8 @@ IMPORTFILE      "import_file"
 								return DNS_CACHE_GC_INT; }
 <INITIAL>{DNS_CACHE_DEL_NONEXP}	{ count(); yylval.strval=yytext;
 								return DNS_CACHE_DEL_NONEXP; }
+<INITIAL>{AUTO_BIND_IPV6}	{ count(); yylval.strval=yytext;
+								return AUTO_BIND_IPV6; }
 <INITIAL>{DST_BLST_INIT}	{ count(); yylval.strval=yytext;
 								return DST_BLST_INIT; }
 <INITIAL>{USE_DST_BLST}	{ count(); yylval.strval=yytext;

cfg.y

@@ -164,6 +164,11 @@
 		if (rt!=ONSEND_ROUTE) yyerror( s " allowed only in onsend_routes");\
 	}while(0)
 
+#ifdef USE_IPV6
+	#define IF_AUTO_BIND_IPV6(x) x
+#else
+	#define IF_AUTO_BIND_IPV6(x) warn("IPV6 support not compiled");
+#endif
 
 #ifdef USE_DNS_CACHE
 	#define IF_DNS_CACHE(x) x
@@ -419,6 +424,10 @@ extern char *finame;
 %token DNS_CACHE_MEM
 %token DNS_CACHE_GC_INT
 %token DNS_CACHE_DEL_NONEXP
+
+/* ipv6 auto bind */
+%token AUTO_BIND_IPV6
+
 /*blacklist*/
 %token DST_BLST_INIT
 %token USE_DST_BLST
@@ -877,6 +886,8 @@ assign_stm:
 	| DNS_CACHE_GC_INT error { yyerror("boolean value expected"); }
 	| DNS_CACHE_DEL_NONEXP EQUAL NUMBER   { IF_DNS_CACHE(default_core_cfg.dns_cache_del_nonexp=$3); }
 	| DNS_CACHE_DEL_NONEXP error { yyerror("boolean value expected"); }
+	| AUTO_BIND_IPV6 EQUAL NUMBER {IF_AUTO_BIND_IPV6(default_core_cfg.auto_bind_ipv6 = $3);}
+	| AUTO_BIND_IPV6 error { yyerror("boolean value expected"); }
 	| DST_BLST_INIT EQUAL NUMBER   { IF_DST_BLACKLIST(dst_blacklist_init=$3); }
 	| DST_BLST_INIT error { yyerror("boolean value expected"); }
 	| USE_DST_BLST EQUAL NUMBER {

cfg_core.c

@@ -105,6 +105,9 @@ struct cfg_group_core default_core_cfg = {
 	0, /*!< dns_cache_del_nonexp -- delete only expired entries by default */
 	0, /*!< dns_cache_rec_pref -- 0 by default, do not check the existing entries. */
 #endif
+#ifdef USE_IPV6
+	0, /*!< auto_bind_ipv6 -- off by default */
+#endif
 #ifdef PKG_MALLOC
 	0, /*!< mem_dump_pkg */
 #endif
@@ -272,6 +275,11 @@ cfg_def_t core_cfg_def[] = {
 		" 2 - prefer new records"
 		" 3 - prefer records with longer lifetime"},
 #endif
+#ifdef USE_IPV6
+	{"auto_bind_ipv6", 	CFG_VAR_INT,	0, 1, 0, 0, 0,
+		"enable/disable auto binding of proxy to IPV6 interfaces."
+		"default is disabled 0"},
+#endif
 #ifdef PKG_MALLOC
 	{"mem_dump_pkg",	CFG_VAR_INT,	0, 0, 0, mem_dump_pkg_cb,
 		"dump process memory status, parameter: pid_number"},

cfg_core.h

@@ -93,6 +93,11 @@ struct cfg_group_core {
 	int dns_cache_del_nonexp;
 	int dns_cache_rec_pref;
 #endif
+
+#ifdef USE_IPV6
+	int auto_bind_ipv6;
+#endif
+
 #ifdef PKG_MALLOC
 	int mem_dump_pkg;
 #endif

socket_info.c

@@ -1712,9 +1712,9 @@ int fix_all_socket_lists()
 		if ( ( (add_interfaces(0, AF_INET, 0,  PROTO_UDP, &ai_lst)==0)
 #ifdef USE_IPV6
 #ifdef __OS_linux
-		&& (add_interfaces_via_netlink(0, AF_INET6, 0, PROTO_UDP, &ai_lst) == 0)
+		&&  (!(cfg_get(core, core_cfg, auto_bind_ipv6)) || add_interfaces_via_netlink(0, AF_INET6, 0, PROTO_UDP, &ai_lst) == 0)
 #else
-		&& (add_interfaces(0, AF_INET6, 0,  PROTO_UDP, &ai_lst)==0) /* add_interface does not work for IPv6 on Linux */
+		&& ( !(cfg_get(core, core_cfg, auto_bind_ipv6)) || add_interfaces(0, AF_INET6, 0,  PROTO_UDP, &ai_lst) !=0 ) /* add_interface does not work for IPv6 on Linux */
 #endif /* __OS_linux */
 #endif /* USE_IPV6 */
 			 ) && (addr_info_to_si_lst(ai_lst, 0, PROTO_UDP, 0, &udp_listen)==0)){
@@ -1726,12 +1726,12 @@ int fix_all_socket_lists()
 				if ( ((add_interfaces(0, AF_INET, 0,  PROTO_TCP, &ai_lst)!=0)
 #ifdef USE_IPV6
 #ifdef __OS_linux
-    				|| (add_interfaces_via_netlink(0, AF_INET6, 0, PROTO_TCP, &ai_lst) != 0)
+    				|| (cfg_get(core, core_cfg, auto_bind_ipv6) && add_interfaces_via_netlink(0, AF_INET6, 0, PROTO_TCP, &ai_lst) != 0)
 #else
-				|| (add_interfaces(0, AF_INET6, 0,  PROTO_TCP, &ai_lst)!=0)
+				|| (cfg_get(core, core_cfg, auto_bind_ipv6) && add_interfaces(0, AF_INET6, 0,  PROTO_TCP, &ai_lst) !=0 )
 #endif /* __OS_linux */
 #endif /* USE_IPV6 */
-				)|| (addr_info_to_si_lst(ai_lst, 0, PROTO_TCP, 0,
+				) || (addr_info_to_si_lst(ai_lst, 0, PROTO_TCP, 0,
 										 				&tcp_listen)!=0))
 					goto error;
 				free_addr_info_lst(&ai_lst);
@@ -1742,9 +1742,9 @@ int fix_all_socket_lists()
 										&ai_lst)!=0)
 #ifdef USE_IPV6
 #ifdef __OS_linux
-    				|| (add_interfaces_via_netlink(0, AF_INET6, 0, PROTO_TLS, &ai_lst) != 0)
+    				|| (cfg_get(core, core_cfg, auto_bind_ipv6) && add_interfaces_via_netlink(0, AF_INET6, 0, PROTO_TLS, &ai_lst) != 0)
 #else
-				|| (add_interfaces(0, AF_INET6, 0,  PROTO_TLS, &ai_lst)!=0)
+				|| (cfg_get(core, core_cfg, auto_bind_ipv6) && add_interfaces(0, AF_INET6, 0,  PROTO_TLS, &ai_lst)!=0)
 #endif /* __OS_linux */
 #endif /* USE_IPV6 */
 					) || (addr_info_to_si_lst(ai_lst, 0, PROTO_TLS, 0,
@@ -1761,9 +1761,9 @@ int fix_all_socket_lists()
 				if (((add_interfaces(0, AF_INET, 0,  PROTO_SCTP, &ai_lst)!=0)
 #ifdef USE_IPV6
 #ifdef __OS_linux
-    				|| (add_interfaces_via_netlink(0, AF_INET6, 0, PROTO_SCTP, &ai_lst) != 0)
+    				|| (cfg_get(core, core_cfg, auto_bind_ipv6) && add_interfaces_via_netlink(0, AF_INET6, 0, PROTO_SCTP, &ai_lst) != 0)
 #else
-				|| (add_interfaces(0, AF_INET6, 0,  PROTO_SCTP, &ai_lst)!=0)
+				|| (cfg_get(core, core_cfg, auto_bind_ipv6) && add_interfaces(0, AF_INET6, 0,  PROTO_SCTP, &ai_lst) != 0)
 #endif /* __OS_linux */
 #endif /* USE_IPV6 */
 					) || (addr_info_to_si_lst(ai_lst, 0, PROTO_SCTP, 0,